route and wrap and unwrap eth && test

contracts/helper/NativeOracle.sol

@@ -0,0 +1,25 @@
+/*
+
+    Copyright 2020 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+pragma experimental ABIEncoderV2;
+
+import {Ownable} from "../lib/Ownable.sol";
+
+
+// Oracle only for test
+contract NaiveOracle is Ownable {
+    uint256 public tokenPrice;
+
+    function setPrice(uint256 newPrice) external onlyOwner {
+        tokenPrice = newPrice;
+    }
+
+    function getPrice() external view returns (uint256) {
+        return tokenPrice;
+    }
+}